This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

%User Profile%\dogzekesupwy.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

dogzekesupwy = "%User Profile%\dogzekesupwy.exe"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion

AppManagement = "{random value}"

In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion

dogzekesupwyzap = "{random value}"

To delete the registry value this malware created:

Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.

In the left panel of the Registry Editor window, double-click the following: HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run

In the right panel, locate and delete the entry:dogzekesupwy = "%User Profile%\dogzekesupwy.exe"

In the left panel of the Registry Editor window, double-click the following: HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion

In the right panel, locate and delete the entry:AppManagement = "{random value}"

Again In the right panel, locate and delete the entry:dogzekesupwyzap = "{random value}"

Close Registry Editor.

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CUTWAIL.KH. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.